msm: kgsl: Update powerup register list for A615 GPU

GPU_UCHE_GBIF_GX_CONFIG is programmed as a part of a hardware quirk to
limit the number of read/write transactions from UCHE block to GBIF.
Move this from IFPC powerup register list to IFPC + Preemption register
list to make sure it's value is restored during preemption context switch.

Change-Id: I967ff0cdbbee2599c9fc08d13de7a3345b65aee3
Signed-off-by: Akhil P Oommen <akhilpo@codeaurora.org>